About Boris19

Boris19 · 2024-03-21

Hello everyone,After several hours of searching, I haven't found a working example of an electronic schematic for interfacing a USB OTG port with an STM32 F7.Furthermore, the documentation provided "AN4869 Rev6" by ST is not clear enough to produce a...

Boris19 · 2024-03-13

Hello everyone,I've been looking for some time for an example of an electronic design that would allow me to use the STLINK-V3MINIE in JTAG mode.With my electronic schematic I can use it in SWD mode, which works very well.However, it's impossible to ...

Boris19 · 2024-03-28

Hello @FBL Thank you for your message and your help.To avoid superfluous problems I will modify my Q1 transistor by using a bipolar NPN transistor and adding the 2 bridge resistors.That said, I'm not convinced that 0 ohm resistors are useful. I did s...

Boris19 · 2024-03-27

Hello again @FBL Thank you for your reply.I answer between the lines.1. USB Disco pin cannot be connected to USB_DP signal.However, this is what is described in your diagram with a 1.5kohm resistor.Your example:My idea: 2. Why do you use USB_VBUS_DET...

Boris19 · 2024-03-25

Hello @FBL Thank you for your reply.To repeat your comments:"VDDUSB is different from VBUS. VDDUSB=3.3V allows supplying USB transceiver: PHY FS in your case."- Indeed"When HNP or SRP is enabled the VBUS sensing pin should be connected to VBUS."- Ok ...

Boris19 · 2024-03-24

Hello @FBL Thank you for your reply.That's my problem, in my opinion the 2 documents you gave me are contradictory.In "Application note" chapter 3.3 page 16 there is this concept diagram:The VBUS line is directly linked to the MCU.But in the "Harware...

Boris19 · 2024-03-13

Hello @Pavel A. ans thanks for your reply.You're absolutely right, and in my case it would seem to be much better to use SWD.But still, how to make it work.Why doesn't my schematic allow the use of JTAG?Best Regards.

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How to design an USB OTG interface

Electronic design for JTAG/SWD

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